Marco Pierre White Jr's fiancée Kim Melville-Smith has taken to Twitter to state she needs a "juice cleanse" following the hunk's sexual antics with Laura Carter in the 'Big Brother' house

Marco Pierre White Jr's fiancée feels as though she needs a "juice cleanse" to make herself "feel better" following the confirmation her man had sex with Laura Carter in 'Big Brother' house.

Kim Melville-Smith took to her Twitter account in the wake of Laura's confession on the Channel 5 reality TV show that she and the tattooed hunk had intercourse under the covers in bed to state she needs to undertake a fresh health kick to rid herself of bad feelings.

She tweeted: "Feel I need to do a #juice #detox #juicecleanse I feel like this will make me feel better on the inside. Any1 know of any good companies? (sic)"

The fashion designer has been seeking comfort from her friends as she deals with Marco's racy antics with fellow contestant Laura in the 'BB' house, justifying his behaviour by suggesting he and Kim are in an "open relationship".

In other tweets, Kim said: "Out with a bunch of friend's for a birthday dinner ... The purpose of life is to be happy everyday. Nothing like being with good friends and having a fashion show to go to, to take your mind off things. @gavinodivino @alexjames2nd thank you (sic)"

Kim had previously denied that she and Marco have an open relationship, and blasted the handsome charmer - the son of celebrity chef Marco Pierre White - for saying otherwise.

She tweeted: "Fyi I said #hallpass NOT open relationship. I don't watch bb, but I heard this today. Worst thing I can't even talk to him #bbuk #bbmarco."

Earlier this week, Marco, 21, appeared to call off his engagement to Kim when he told fellow housemate Emma Jensen he wants to "be free, like a bird".

Speaking to the brunette beauty, Marco said: "Until I find the right person, I just want to be free. I just want to be a bird. Got any cool friends that I would be perfect for?"